python下多线程简单代码示例

此处仅为代码demo示例，隐去部分细节实现：

#!/usr/bin/python
# -*- coding: UTF-8 -*-

# function:threading test
# author:liu
# time:2017.8.12

import MySQLdb,threading

# 子线程
def func(arg):
    print '--------- thread %s is running ----------' %threading.current_thread().name
    #此处执行子线程操作
    print '----------   thread %s ended   ----------' %threading.current_thread().name

# connect mysql database
conn = MySQLdb.connect(host = 'localhost', user = 'xxx', passwd = 'xxx', db = 'xxx', charset = 'utf8')
cursor = conn.cursor()
sql = 'SELECT * FROM `table_name` WHERE 1'
try:
    cursor.execute(sql)
    data = cursor.fetchall() #tuple
    # 创建子线程
    for task in data:
        arg = task[1]
        t = threading.Thread(target = func, args = (arg,))
        t.start()
except:
    print "Error: unable to fecth data" 

# close mysql connect
conn.close()